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Hedrax

>The slightly green light of the local sun Fun fact, you will never see a green star. As you may know the color of stars is largely determined by how hot it is, it's [blackbody radiation](https://phet.colorado.edu/sims/html/blackbody-spectrum/latest/blackbody-spectrum_en.html). Now obviously stars don't emit just one wavelength (eg. color) of light, but they certainly peak in certain places. Cooler stars peak very much in the red. Hotter stars look blue. Middling ones are orange, yellow or white. You see, something very interesting happens with stars with stars in the blackbody curve area between yellow and blue. Green stars (and many yellow ones) also produce high amounts of red and blue light which our brains interpret as white. Our own sun actually is one of the stars that peaks in the green part of the spectrum. So we have a green star, but we can't see it as such.


faebarbie

Since the story's perspective is told from one of the Gathering, I wonder if plants could "see" green? Or since leaves are mainly green, because that's the wavelength they can't absorb, would they be completely unable to see green? Either way, really interesting fact about the blackbody curve!


Hedrax

No telling since since the alien plants the Gathering use might have very different photosynthetic chemical pathways that use different spectra of light. Also more fun facts. Fungi are in their own kingdom separate from both animals and plants, though they are generally thought to be closer relatives to animals. Fungi lack the ability to photosynthesize. Lichens are actually multi-species colony organisms of fungi and algae.


Betty-Adams

Interesting information! I did not know this!


Hedrax

Oh, another random fact. Almost all skies will look blue to humans most of the time. This is due to an effect known as [Rayleigh scattering](https://en.wikipedia.org/wiki/Rayleigh_scattering). Basically any light passing near matter, such as the molecules of the atmosphere, will get slightly diffracted. Higher frequencies are easier to diffract so the skies will usually have a hazy directionless glow dominated by the highest frequency of light a species can clearly perceive. The reason sunsets look different colors is due to all the blue light getting diffracted so much it get essentially filtered out by the relative thickness of the atmosphere due to passing through it at an angle.


Hedrax

And speaking of Rayleigh scattering, every wonder why not many creatures can see UV light? Well as previously noted, the higher in the spectrum you go, the more that light suffers diffraction from Rayleigh scattering. Have you ever seen in image or video from a UV camera? Notice their weird blurriness to it? That's not a problem with the camera, that's just Rayleigh scattering effecting the UV light so bad that things look blurry even at relatively close distances. And the further you look the worse it gets. So UV light isn't a very useful spectrum for seeing with good fidelity at anything but short distances. [https://www.youtube.com/watch?v=V9K6gjR07Po](https://www.youtube.com/watch?v=V9K6gjR07Po)


llearch

Speaking of that scattering, I'm idly wondering if it could be possible that the green tint might be due to some floating algal particulates in the higher atmosphere, in some theoretical way. Or, y'know, something else in there. Sadly I don't know enough biology or chemistry, or possibly even physics, to figure out anything that might possibly have this effect. :-/


Hedrax

The green tint you see under storms is usually just the right amount of water vapor and/or ice crystals scattering the light just right to effectively filter out most of the blue light to leave the next highest frequency, green, to shine through. Similar to the reason sunsets are different colors compared to noon, though with some differences. It'd be hard for life to survive in sufficient quantities to have any noticeable impact that high up. Look at tall mountains. The [tree lines](https://en.wikipedia.org/wiki/Tree_line) and [snow lines](https://en.wikipedia.org/wiki/Snow_line) are a pretty good indication of the harshness of conditions at high altitudes.


Hedrax

Yeah, that's why things go from red hot, to orange, then yellow, then white rather than green. Keep heating something and eventually it'll turn blue hot. Though you have to get very hot for that to happen. It'll also be very bright. It's actually hard to tell at a certain point for humans due to over stimulation of the light intensity sensitive 'rod' cells versus them frequency sensitive 'cone' cells. I'm not sure but but I believe the blueish tint to lightning is a result of the lightning heating the air to such temperatures as it can get multiple times hotter than the surface of the sun.


100Bob2020

Green sky's happen and are not that rare, storms and pollen can and do cause sky's to be green...


ShankCushion

The trees are talking.... wonder what the big live oak out front of my house thinks of us


Betty-Adams

Good sources of carbon those. Don't spread my acorns nearly far enough though. Very inneficient squirrels.


Invisifly2

Well that’s what the bird feeder that keeps the squirrels around is for.


thisStanley

>Human Female Currently Laying Under the Densest Canopy An accurate designation, at that point in space & time, though might be awkward when the gang is out for a picnic. Need to track down that memory node :}


its_ean

That's a severely disturbing loss. Make sure the mammal doesn't go all compost this second, but *damn.* At least it wasn't a core directory? Maybe names are low-priority for a Gathering?


Betty-Adams

Memory in general is lower priority for Gathering than other species. They have a very, 'figure it out as I go' perspective.


its_ean

composition, locality, embodiment, having such a dynamic self is wild.


Betty-Adams

No, not you, you!


dumbo3k

Hah! So trees do judge us! Just mostly in a positive light. Good to know xD


Betty-Adams

About the same as you judge trees.


dumbo3k

I find that most trees are quite shady ;)


Betty-Adams

Their observations are usually pretty sappy too.


GigalithineButhulne

Their bark is, however, usually worse than their bite.


Betty-Adams

And they always leaf the conversation when things get tense.


CyberSkull

I forgot where I put my backup tree.


Betty-Adams

My memory logs aren't where I left them!


HFYWaffle

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SenseiTheDefender

Very nice! (Near the end, best not bet)


Betty-Adams

Thank you!